Line fastening device



FIG. 1 is a front elevational view of a line fastening device showing my new design

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a rear perspective view thereof; and,

FIG. 5 is a side view thereof. 

CLAIM The ornamental design for a line fastening device, as shown and described. 